chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/tsconfig.base.json

@@ -0,0 +1,25 @@
+{
+	"compilerOptions": {
+		"target": "ES2022",
+		"module": "Node16",
+		"lib": ["ES2022"],
+		"strict": true,
+		"erasableSyntaxOnly": true,
+		"esModuleInterop": true,
+		"skipLibCheck": true,
+		"forceConsistentCasingInFileNames": true,
+		"declaration": true,
+		"declarationMap": true,
+		"sourceMap": true,
+		"inlineSources": true,
+		"inlineSourceMap": false,
+		"moduleResolution": "Node16",
+		"resolveJsonModule": true,
+		"allowImportingTsExtensions": true,
+		"rewriteRelativeImportExtensions": true,
+		"experimentalDecorators": true,
+		"emitDecoratorMetadata": true,
+		"useDefineForClassFields": false,
+		"types": ["node"]
+	}
+}